Wyniki wyszukiwania - BazTech

1

Determination of fuel atomization quality in compression ignition engines using acoustic emission signal

Klyus Oleh, Rajewski Przemysław, Lebedevas Sergeus, Olszowski Sławomir

Combustion Engines

|

2022

|

R. 61, nr 4

83--91

EN

The analysis of fuel injection processes in diesel engines showed the convergence of physical parameters affecting the mean diameter of the Sauter SMD (selected as a spray quality parameter) of the atomized fuel droplets and the parameters of the acoustic signal emission originating from the spring waves accompanying the atomization process. In experimental studies, the laser diffraction method was used to measure the atomization quality with the Malvern Spraytec device. For the acoustic signal recording and processing there was used the measurement set with a Fujicera 1045S sensor. The correlation between the values of the Sauter diameter and the energy of the acoustic signal has been obtained on the basis of which a method has been developed to assess the quality of fuel atomization in compression ignition engines by measuring the acoustic signal recorded during the fuel injection process.

2

The effect of adjuvant concentration on changes of spray characteristics and spraying parameters for selected types of nozzles

Milanowski Marek, Subr Alaa, Parafiniuk Stanisław, Różańska-Boczula Monika

Agricultural Engineering

|

2022

|

Vol. 26, No. 1

119--132

EN

The paper presents the results of the research on the influence of the adjuvant concentration on the size of the drops produced by the spray nozzles of agricultural sprayers. For the tests, adjuvant Normaton with the composition of total nitrogen, amide nitrogen (N-NH2) and phosphorus pentoxide (P2O5) was used. The adjuvant was added to the water taken from the municipal water supply system of the city of Lublin. The tests were carried out for three concentrations, i.e. 75%, 100%, and 125% of the adjuvant concentration recommended by the manufacturer, and water without the adjuvant. The surface tension of water with adjuvant was examined for each nozzle. Then, the size of the obtained droplets was measured for each adjuvant concentration. Two types of nozzles were used for spraying, standard nozzle AP 120-03 and 6MSC injector nozzle, both with the same nozzle flow rate, but with a different design. The size of the droplets produced was measured on a HELOSVARIO laser diffractometer by Sympatec. The droplet measurement was performed at a pressure of 3 bar. The nozzle was placed 50 cm above the diffractometer laser light line. The droplet size was measured in three places of the sprayed liquid, i.e. in the position of the nozzle axis, 30 and 60 cm from the nozzle axis. It was shown that the addition of the adjuvant influenced the number of droplets produced in the indicated droplet size classes.

PL

W pracy przedstawiono wyniki badań nad wpływem stężenia adiuwanta na wielkość kropel wytwarzanych przez rozpylacze rolnicze. Do badań użyto adiuwantu Normaton o składzie: azot całkowity, azot amidowy (N-NH2) i pięciotlenek fosforu (P2O5). Adiuwant dodawano do wody pobieranej z miejskiej sieci wodociągowej z Lublina. Badania przeprowadzono dla trzech stężeń, tj. 75%, 100% i 125% stężenia adiuwanta zalecanego przez producenta, oraz dla wody bez dodatku adiuwanta. Dla każdego stężenia adiuwanta badano napięcie powierzchniowe, a następnie mierzono wielkość uzyskanych kropel adiuwanta. Do opryskiwania użyto dwóch typów rozpylaczy: rozpylacza standardowego AP 120-03 i rozpylacza eżektorowego 6MSC - oba o takim samym natężeniu przepływu, ale o innej konstrukcji. Wielkość wytwarzanych kropel mierzono za pomocą dyfraktometru laserowego HELOS-VARIO firmy Sympatec. Pomiar kropel przeprowadzono pod ciśnieniem 3 barów. Rozpylacz umieszczano 50 cm nad linią światła lasera dyfraktometru. Wielkość kropel mierzono w trzech miejscach rozpylanej cieczy, tj. w na osi rozpylacza oraz w odległości 30 i 60 cm od osi rozpylacza. Wykazano, że dodatek adiuwanta wpływa na liczbę wytwarzanych kropel we wskazanych klasach wielkości kropel.

3

Evaluation of the suitability of synthetic polymer fuels in self-ignition engines

Klyus Oleh, Krause Paweł, Markov Vladimir A., Skarbek-Żabkin Anna, Sa Bowen

Combustion Engines

|

2019

|

R. 58, nr 3

129--134

EN

The article presents a method for determining the quality of spraying a mixture of oil and synthetic fuels obtained from the processing of polymer materials. Laboratory tests of physical parameters of such a mixture were carried out, which made it possible to determine the limit values for the volume fraction of synthetic fuels. The method of determining the suitability of this type of fuel takes into account the criterion numbers Re and Oh, which include physical parameters such as viscosity, density, and surface tension. The experimental part concerning the distribution of droplets of injected fuel and determination of Sauter Mean Diameter using laser diffraction confirmed the usefulness of the developed method for the assessment of the possibility of using a mixture of petroleum-based and synthetic fuels in self-ignition engines.